Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
  • F02M37/04—Feeding by means of driven pumps
  • F02M37/08—Feeding by means of driven pumps electrically driven
  • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
  • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
  • F04C11/008—Enclosed motor pump units

Definitions

• the invention relates to an internal tank fuel pump unit with a vertically arranged, cylindrical unit housing, which has an open lower end, into which a base plate is inserted, which contains an intake duct that extends from the outer surface of the base plate and in one Intake opening in the inner surface of the base plate opens.
• the invention has for its object to provide an In ⁇ entank- fuel pump unit of the generic type, in which the formation of gas bubbles is largely prevented.
• the base plate has a smooth outer surface which is flush with the edge of the unit housing or overlaps this edge.
• an insert part which can be placed on the existing base plate and which is aligned with the suction opening in the base plate and funnel outwards can be provided ⁇ shaped widening intake duct and which in turn has a smooth outer surface that is flush with the edge of the unit housing or overlaps this edge.
• FIG. 1 shows a partial longitudinal section of an inner tank fuel pump unit with a base plate designed according to the invention
• Fig. 2 shows a plan view of the unit shown in Fig. 1 from below, i.e. towards the bottom plate, on a smaller scale, and
• FIG. 3 shows a section similar to FIG. 1, an insert being placed on a conventional base plate.
• the inner tank fuel pump unit shown in FIG. 1 has a vertical, cylindrical unit housing 1, in which a unit 2 consisting of a fuel pump and an electric motor driving it is arranged.
• the aggregate housing has an open lower end 3, into which a base plate 4 is inserted, from the outer surface 5 of which a suction channel 6 extends, which opens into a suction opening 7 on the inside 8 of the base plate 4.
• the outer surface 5 of the base plate 4 is convexly curved and smooth and is flush with the edge 9 of the unit housing 1.
• the intake duct 6 is kidney-shaped and narrows in a funnel shape to the kidney-shaped intake opening. 7.
• the edge 10 surrounding the intake duct 6 is, as shown in FIG. 1, strongly rounded.
• the fuel tank should be able to be largely emptied as far as possible with internal tank pumps. This has the prerequisite that the suction opening or the mouth of the suction channel 6 one. has the smallest possible distance from the bottom 11 of the fuel tank shown in dashed lines. In order to keep this distance a_ as small as possible, but nevertheless to obtain a sufficient cross section for the intake duct 6, closes the radially outer wall 12 of the intake duct 6 makes a smaller angle with the longitudinal central axis 13 of the unit housing 1 than the radially inner wall 14.
• an insert part 15 is placed on the conventional base plate 14, which has a jagged outer surface, which is set back from the edge 9 of the unit housing 1, which corresponds to the base plate 4 in FIG. 1 has a convexly curved, smooth outer surface 16, which in this case overlaps the edge 9 of the unit housing 1.
• the insert part 15 contains a suction channel 18 which is aligned with the suction opening 17 in the base plate 14 and widens outwardly in the shape of a funnel, which in turn is designed in the manner described in connection with FIG. 1.
• This pump insert 15, which is attached to the base plate 14, for example by gluing, can be used to convert existing pump assemblies.
• the base plate 4 or the insert part 15 can consist of plastic or also of metal, preferably aluminum.
• the base plate 4 of FIG. 1 can also be designed such that it overlaps the edge 9 of the unit housing like the insert part 15 of FIG. 3.
• the insert part 15 of FIG. 3 can be designed such that its outer surface 16 is flush with the edge 9 of the aggregate housing 1.
• the pump unit according to the invention is preferably used in connection with a so-called swirl pot which is surrounded by a sieve which keeps impurities away from the pump. This eliminates the Necessity to provide a screen directly in front of the suction opening or the suction channel of the pump, which contributes to the formation of gas bubbles owing to the pressure drop it generates.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
• Details Of Reciprocating Pumps (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6807924

Family Applications (1)

Country Status (5)

Cited By (1)

Families Citing this family (2)

Citations (5)

Family Cites Families (10)

• 1987
  • 1987-05-12 DE DE8706776U patent/DE8706776U1/de not_active Expired
• 1988
  • 1988-05-05 US US07/442,327 patent/US5022830A/en not_active Expired - Fee Related
  • 1988-05-05 WO PCT/DE1988/000267 patent/WO1988008929A1/de active IP Right Grant
  • 1988-05-05 DE DE8888903765T patent/DE3861794D1/de not_active Expired - Fee Related
  • 1988-05-05 DE DE8805993U patent/DE8805993U1/de not_active Expired
  • 1988-05-05 JP JP1990600019U patent/JPH0346217Y2/ja not_active Expired
  • 1988-05-05 EP EP88903765A patent/EP0364459B1/de not_active Expired - Lifetime

Patent Citations (5)

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